Improvement in door-latches



tniit iatzt ELI S. BITNER, OF LOCK HAVEN, PENNSYLVANIA.

Letters Patent N0. 113,729, datedApril 18, 1871.v

IMPROVEMENT IN DOOR-LATCHES.

Thepschedule referred to in these Letters Patent and making part of thesame.

I, ELI Si BrrNnR, of the city of Lock Haven, in the county of Clintonand State of Pennsylvania, have invented certain Improvements inDoor-Latches, the particulars of which-are fully set forth in thefollowing specification and accompanying drawing.

Nature mul Objects of the Intention.

The main points in the construction of latches for doors are simplicity,durability and ease, and convenience of operating. These I haveendeavored to secure in my revolving latch -for closet doors, which Iconstruct as follows, reference being had to the accompanying drawing,of which- Figure l is a front View.

Figure 2 is an edgeor end View. j

Figure 3 shows the cylinder and the gravity-knob or ring.'

General Description.

A is a solid cylinder of metal, having a portion removed or ont out ateach end B B for both right and left doors, so that the concussionagainst the striker E, when closing the door, causes the cylinder torevolve or turn in its seat and lift the thumb-piece or knob C to such aheight that, when the door is fully closed, said thumb-piece or knobwill cause the cylinder to turn in the opposite direction, resuming,rits original position with the end in the recess of the catch or strikeE, so as to secure the door when closed.

For securing the cylinder to the door I use avat metal hasp or staple,D, `having :t slot, 71, or two sepmate hasps, so bent ns partly toencircle the cylinder,

which may be partly imbedded or placed entirely upon the surface of thedoor, and secured thereto by means of screws or nails. The thumb-pieceor knob O may be made of metal, porcelain, or any other suitablematerial. lvhe strike is made of metal in the ordinary manner, as for,common latches, and recessed for the reception ofthe,semi-cylindrical'end of 'the latch, and secured to the doorjamb bymeans of screws or otherwise.-

I do not limit myself to any particular size or length of cylinder orform of strap for securing it to the door; nor do I limit myself to anyparticular size or form of 4thumb-piece or knob; but I construct them ofsuch size and such proportions as will best adapt them to the purposeand forthe use intended, having the knob or" thumb-piece of such weightthat, by its gravity, the'cylindcr is compelled to turn in its seat andsecure the door when closed.

Claim.

What I claim, and desire to secure by LetterslPatent, is-

A cylindrical revolving door-latch, having a portion oi' the 'cylinder'removed, so that, when it comes in contact with the strike, it turns inits seat, raising the weight or knob, which, when the door is fullyclosed, causes the cylinder to turn and fall into the recess of' thestrike, thereby seeming the door.

' ELI. S. BITNER. Witnesses:

G. W. BATCHEL, J oNAs ZINDEL.

